{"nhtsa_id":52179,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-07-17","date":"1997-03-14","document_id":"82/01/97/NAS","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"REFRIGERANT R-134A RETROFIT. *JD","document":null,"url":"https://open.wenmarpro.com/bulletins/52179","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"LAND ROVER","model":"CLASSIC","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"LAND ROVER","model":"DEFENDER 110","year_from":null,"year_to":null,"match":"base","vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}